Clearer distinctions of colour for Private window's

[FirefoxUser8]

I've recently updated to 157.0 and appreciate the update overall. The only issue is I cannot distinguish between regular windows and private windows.

In previous versions the title bar was all purple which was easy to distinguish. Now we only have a small purple icon.

I use Private windows every day for work and personal work so please can you make a change to the window colour of Private windows again?

[kelimuttu]

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